MBT Schuhe günstig TV industry watching the progr

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TV industry watching the progress of high-definition television (a)

With a VHS tape can be compared. The equipment for industrial use. Present in high-definition theater, it has been used in film projection; in public facilities and event hall has been used in playback display. If you are using analog FM video recording system, the system capacity using 63-minute video tape metallization. High definition, high definition images highlight of course depends on the current use of the display. Generating high-resolution images of power and effects, wide screen is indispensable. Now the display on the market were powered by the cathode ray tube. The weight of the cathode ray tube and the structure of manufacturing large-screen look into the cathode ray tube is very difficult. In fact, most of the cathode ray tube only 40 inches of Fange so more than 40 inches within the display device uses a projection system. In high-definition television systems, 30 to 60 inch screen suitable for home, and l00 ~ 200-inch screen is suitable for use in small theaters. The formal requirements of the theater screen is 200 to 400 inches. II clarity and high degree of co-existence of high-brightness display with the current television compared. High definition television system used in the cathode ray tube shadow mask smaller groove spacing to improve clarity. Using this method. Electron-beam shadow mask sets to lower pass rates, and thus the brightness of TV display brightness down to now 20 or 30. In order to solve the brightness problem, using many techniques, including: the beam current density of the electron gun; used in high current density to torsional bending of the metal alloy shadow mask; promote electron beam deflection system to screen and digital convergence circuit. Large-screen high-brightness projection images to achieve in the system. The system will display the image to zoom in and projection, well lead to decrease in brightness,[link widoczny dla zalogowanych], and inversely proportional to the size of the screen. So. To work out some technical,[link widoczny dla zalogowanych], they are necessary to meet the requirements of the big screen, while the fork to maintain the required brightness. New projection cathode ray tube system compared with the past, it used a higher beam current, and also used a new system to cool the negative Electronic Engineering 58 2 1992 cathode ray tube of the pipe surface. Leaving the cooling system prevents the breakdown bulb life expectancy. These two factors make the image brighter and double screen projection coefficient determines the brightness of the front projection device, the transmission rate of the brightness of the back projection device. To ensure the high diffusion reflection coefficient of 50-1. . Inches to precision projection screen foil as a reflective screen. The entire screen with concave structure. Rear projection device with a convex lens on the screen or Fresnel lens, to ensure the required level of direction. Figure l3 high {Jian Yin Qing Xi of electricity and the general ray tube projection television cathode ray tube screen structure References [1] Hi-VisionTechnology, editedbyNHKBroadcastingTechnologyResearchCenter-pub] ishedbyNip-ponHosoShuppanKyokai (JapanBroadcastPublishingCorporation) onNov25, 1988 - [21ProcessofHDTV (Hi. Vision) Deve] opmem. byTahashlFuiio-TelevisionSocietyMagazine'Vol-42-No. 6-1988. [3] Fo ~ u] aa Shí Standard \7-1988 ・ [4] ExhaustireExplanationofHi-VisionSystembySachioSugiura-ElectronicsLife, Janua1990Is] \byNHKr71ThPathto} Ii. V;. sion. byKazuoEnamiElectronicsLite,[link widoczny dla zalogowanych], Januaryl990 ・ electronic engineering in 1992,[link widoczny dla zalogowanych], a 59 2
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